▎ 摘　　要

NOVELTY - Use of high-performance catalyst in catalytic oxidation degradation of azo dyes. USE - The catalyst is useful in catalytic oxidation degradation of azo dyes (claimed). ADVANTAGE - The grafted polyViEtImBr: increases the surface roughness of the substrate; provides more anchoring sites; interconnects polar heteropolyanions and nonpolar rGO substrates; endows graphene-based catalysts with excellent dispersibility; can fully expose the catalytic sites during the degradation process; exhibits excellent catalytic degradation performance; exhibits the best catalytic activity; reaches the degradation efficiency of methyl orange (MO) to 98.7% within 3 hours; and enables its decolorization efficiency to reach 95% after 5 cycles. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of the catalyst, comprising uniformly dispersing 20 mg rGOpolyViEtImheteropolyanion catalyst in 20 ml methyl orange aqueous solution, stirring at room temperature for 15 minutes, adding 10 μl hydrogen peroxide to obtain the first system, adding 10 ml toluene as extraction agent in the first system, placing the device in oil bath, carrying out magnetic stirring under given temperature, obtaining the second system, periodically centrifuging the lower layer solution from the reaction system during the reaction, detecting using ultraviolet-visible (UV-Vis), extracting 3 ml reaction solution regularly from the aqueous phase of the second system, collecting the supernatant after centrifugation, using UV-Vis to measure its absorbance, centrifuging and recycling the catalyst after the decolorization process is completed, collecting and concentrating the toluene phase, and analyzing the degradation products.